Costars Aubrey Plaza and Elizabeth Olsen turned up to the premiere of their movie Ingrid Goes West wearing the same dress, but what at first glance may seem like a red carpet faux pas was in all likelihood just a good-natured — and stylish — prank. Joke's on us, for sure.

You see, the plot of Ingrid Goes West centers around an Instagram influencer (played by Olsen) and her scary digital stalker (Plaza), who moves out to Los Angeles and adopts a new blonde and totally Insta-worthy style in order to befriend her idol IRL. So naturally, stealing the object of her obsession's lewk is totally something Plaza's character would do.

The actresses certainly seemed to enjoy making us all see double. The two even opted to style their black frocks — Plaza's featured gold sequined embellishment, while Olsen rocked silver — with identical black pumps and similar loose, side-parted hairdos. And as Instagram stars do, they both hammed it up for the cameras, posing together in a prom-like fashion and giggling at their own cleverness.

JB Lacroix/Getty Images

Michael Tran/FilmMagic/Getty Images

JB Lacroix/Getty Images

And all's well that ends well. Later in the evening, Olsen switched up her look in favor of a calf-length black sheath dress and coordinating jacket. Nailed it.